flower/dstream.cc

   1 /*
   2   dstream.cc -- implement Dstream
   3
   4   source file of the Flower Library
   5
   6   (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include <fstream.h>
  10 #include "assoc.hh"
  11 #include "dstream.hh"
  12 #include "scalar.hh"
  13 #include "text-db.hh"
  14 #include "string-convert.hh"
  15 #include "assoc-iter.hh"
  16
  17 /// indent of each level
  18 const INDTAB = 2;
  19
  20 /*
  21   should use Regexp library.
  22   */
  23 static String
  24 strip_pretty (String pretty_str)
  25 {
  26   int i = pretty_str.index_i ('(');
  27   if (i>=0)
  28     pretty_str = pretty_str.left_str (i);
  29
  30   int l = pretty_str.index_last_i (' '); // strip until last ' '
  31   if (l>=0)
  32     pretty_str = pretty_str.nomid_str (0,l+1);
  33   return pretty_str;
  34 }
  35
  36 static String
  37 strip_member (String pret)
  38 {
  39   int l=pret.index_last_i (':')-1;
  40   if (l>=0)
  41     pret = pret.left_str (l);
  42   return pret;
  43 }
  44
  45 Dstream&
  46 Dstream::identify_as (String name)
  47 {
  48   if (!os_l_)
  49     return *this;
  50
  51   String mem (strip_pretty (name));
  52   String cl (strip_member (mem));
  53   String idx = cl;
  54
  55   if (silent_assoc_p_->elt_b (mem))
  56     idx  = mem;
  57   else if (silent_assoc_p_->elt_b (cl))
  58     idx = cl;
  59   else
  60     {
  61       (*silent_assoc_p_)[idx] = false;
  62     }
  63   local_silence_b_ = (*silent_assoc_p_)[idx];
  64   if (current_classname_str_ != idx && !local_silence_b_)
  65     {
  66       current_classname_str_=idx;
  67       if (!(*silent_assoc_p_)["Dstream"])
  68         *os_l_ << "[" << current_classname_str_ << ":]"; // messy.
  69     }
  70   return *this;
  71 }
  72
  73 bool
  74 Dstream::silence (String s)
  75 {
  76   if (!silent_assoc_p_->elt_b (s))
  77     return false;
  78   return (*silent_assoc_p_)[s];
  79 }
  80
  81 Dstream &
  82 Dstream::operator<<(String s)
  83 {
  84   output (s);
  85   return *this;
  86 }
  87
  88 Dstream &
  89 Dstream::operator<<(void const *v_l)
  90 {
  91   output (String_convert::pointer_str (v_l));
  92   return *this;
  93 }
  94
  95 Dstream &
  96 Dstream::operator<<(char const *ch_l)
  97 {
  98   output (ch_l);
  99   return *this;
 100 }
 101
 102 void
 103 Dstream::output (String s)
 104 {
 105   if (local_silence_b_|| !os_l_)
 106     return ;
 107
 108   for (char const *cp = s  ; *cp; cp++)
 109     switch (*cp)
 110       {
 111       case '{':
 112       case '[':
 113       case '(': indent_level_i_ += INDTAB;
 114         *os_l_ << *cp;
 115         break;
 116
 117       case ')':
 118       case ']':
 119       case '}':
 120         indent_level_i_ -= INDTAB;
 121         *os_l_ << *cp           ;
 122
 123         assert  (indent_level_i_>=0) ;
 124         break;
 125
 126       case '\n':
 127         *os_l_ << '\n' << String (' ', indent_level_i_) << flush;
 128         break;
 129       default:
 130         *os_l_ << *cp;
 131         break;
 132       }
 133   return ;
 134 }
 135
 136
 137 Dstream::Dstream (ostream *r, char const * cfg_nm)
 138 {
 139   os_l_ = r;
 140   silent_assoc_p_ = new Assoc<String,bool>;
 141   indent_level_i_ = 0;
 142   if (!os_l_)
 143     return;
 144
 145   char const * fn =cfg_nm ? cfg_nm : ".dstreamrc";
 146   {
 147     ifstream ifs (fn);  // can't open
 148     if (!ifs)
 149       return;
 150   }
 151
 152   Text_db cfg (fn);
 153   while (! cfg.eof()){
 154     Text_record  r (cfg++);
 155     if (r.size() != 2)
 156       {
 157         r.message ("not enough fields in Dstream init.");
 158         continue;
 159       }
 160     (*silent_assoc_p_)[r[0]] = (bool)(int)(Scalar (r[1]));
 161   }
 162
 163 }
 164
 165
 166 Dstream::~Dstream()
 167 {
 168   delete silent_assoc_p_;
 169   assert (!indent_level_i_) ;
 170 }
 171
 172 void
 173 Dstream::clear_silence()
 174 {
 175   for (Assoc_iter<String, bool> i (*silent_assoc_p_); i.ok(); i++)
 176     {
 177       i.val() = false;
 178     }
 179 }